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Cutting a Timber Beam

Cutting a Timber Beam

Cutting a Timber Beam

(OP)
I am installing a timber beam to allow for the removal of a wall
The timber beam will support roof struts and hanging beams.
I need to cut the ends of the new beam at the supports to suit the roof pitch so I can physically fit the beam in
What are the rules as to how much of the end of the beam I am allowed to cut?

RE: Cutting a Timber Beam

Under the IBC/IRC for sawn lumber the NDS shear design should be followed. For GLB the AITC Technical Note 19 (a free download at www.aitc-glulam.org) should be followed.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

RE: Cutting a Timber Beam

It sounds from your post that you are not a structural engineer, and if that is so, you need to retain the services of such. When you cut back the end of a wood beam to fit under a sloping roof at the eave, there is generally not much capacity left. Maybe you need a steel beam.

RE: Cutting a Timber Beam

Hate to say it, but it depends on the situation. If the beam is shear critical - none. If not, then a varying degree depending on the level of shear stress in the area of the cut.

As Hokie said, get a local structural engineer to help you.

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: Cutting a Timber Beam

(OP)
thanks guys - sounds like i need to engage an engineer - was hoping there might of been standard rules to follow

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